document.writeln("<div>");
document.writeln("        <nav class=\'navbar navbar-inverse navbar-fixed-top\' role=\'navigation\'>");
document.writeln("            <div class=\'container-fluid\'>");
document.writeln("                <div class=\'navbar-header\'>");
document.writeln("                    <button type=\'button\' class=\'navbar-toggle\' data-toggle=\'collapse\'");
document.writeln("                        data-target=\'#example-navbar-collapse\'>");
document.writeln("                        <span class=\'sr-only\'>切换导航</span>");
document.writeln("                        <span class=\'icon-bar\'></span>");
document.writeln("                        <span class=\'icon-bar\'></span>");
document.writeln("                        <span class=\'icon-bar\'></span>");
document.writeln("                    </button>");
document.writeln("                    <a class=\'navbar-brand\' href=\'#\'>蓝星图书</a>");
document.writeln("                </div>");
document.writeln("                <div class=\'collapse navbar-collapse\' id=\'example-navbar-collapse\'>");
document.writeln("                    <ul class=\'nav navbar-nav\'>");
document.writeln("                        <li><a href=\'home.html\'>首页</a></li>");
document.writeln("                        <li><a href=\'#\'>童书</a></li>");
document.writeln("                        <li><a href=\'#\'>教辅</a></li>");
document.writeln("                        <li><a href=\'#\'>小说</a></li>");
document.writeln("                        <li><a href=\'#\'>文学</a></li>");
document.writeln("                        <li><a href=\'#\'>青春文学</a></li>");
document.writeln("                        <li><a href=\'#\'>艺术</a></li>");
document.writeln("                        <li><a href=\'#\'>励志</a></li>");
document.writeln("                        <li><a href=\'#\'>管理</a></li>");
document.writeln("                        <li><a href=\'#\'>历史</a></li>");
document.writeln("                        <li><a href=\'#\'>亲子家教</a></li>");
document.writeln("                        <li><a href=\'#\'>科技</a></li>");
document.writeln("                        <li><a href=\'#\'>考试</a></li>");
document.writeln("                    </ul>");
document.writeln("                    <ul class=\'nav navbar-nav navbar-right hidden-sm\'>");
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document.writeln("                        <li class=\'dropdown\'>");
document.writeln("                            <a href=\'#\' class=\'dropdown-toggle\' data-toggle=\'dropdown\'>");
document.writeln("                                张三");
document.writeln("                                <b class=\'caret\'></b>");
document.writeln("                            </a>");
document.writeln("                            <ul class=\'dropdown-menu\'>");
document.writeln("                                <li><a href=\'person_detail.html\'>个人信息</a></li>");
document.writeln("                                <li><a href=\'update_pwd.html\'>修改密码</a></li>");
document.writeln("                                <li class=\'divider\'></li>");
document.writeln("                                <li><a href=\'#\'>退出</a></li>");
document.writeln("                            </ul>");
document.writeln("                        </li>");
document.writeln("");
document.writeln("                        <li><a href=\'shopping.html\'>购物车</a></li>");
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document.writeln("                </div>");
document.writeln("            </div>");
document.writeln("        </nav>");
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